MIL-PRF-85726B(AS)
3.3.6 Escape of fluids. The enclosure shall contain a means of allowing for the escape of
fluids, such as drain holes. The method used to allow fluids to escape, shall accommodate
mounting of the rack in any orientation. Where moisture pockets are unavoidable in unsealed
enclosures, provision shall be made for the drainage of such pockets. Desiccants or moisture-
absorbent materials shall not be used within moisture pockets.
3.3.7 Cooling. The cooling source shall dissipate the heat in the enclosure, and provide the
pressure required for air to flow through the unit.
3.3.8 Fluid entrapment. The enclosure shall not have any feature that may trap a fluid on
the exterior of the enclosure, thereby increasing the possibility of fluid entering the module
compartment.
3.3.9 Module retainer. The module retainer mechanism shall not be part of the enclosure.
The enclosure card guide may be machined to provide interface to module extractors and
injectors. If the enclosure guide is machined, this machining shall not interfere with a retaining
device to clamp the module to the thermal card guide. Machining for module extractor or
injector shall not preclude the use of modules that have no such mechanisms. The mechanism
shall also be accessible (see 3.3.1.2) and replaceable by maintenance personnel.
3.3.10 Wiring harness. The enclosure shall be designed to facilitate the removal and
installation as an assembly of the enclosure input/output connectors, wiring, EMI filters, and the
connectors tying these items to the backplane.
3.3.11 Meters. The enclosure shall be capable of mounting both a time elapsed meter and
built-in test status indicators. The enclosure shall be capable of accommodating meters in
accordance with MIL-M-7793, MIL-M-16034, and MIL-M-16125.
3.3.12 Input/output connectors.
3.3.12.1 Front. The enclosure shall accommodate front mounted connectors as specified in
MIL-C-38999, series III and IV. Connectors shall be removable from the inside of the enclosure.
3.3.12.2 Rear. The rear-mounted rack and panel connector position in the enclosure shall
accommodate connectors specified in MIL-C-83527.
3.3.12.3 Connector restriction. Front and rear connectors shall not be used simultaneously.
3.3.13 Nameplate. There shall be provisions to mount a nameplate, including the serial
number, on the front of the enclosure.
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